Yes, it looks like a head...but get closer to it - examine it - look for anything unusual (like faint tool marks). Being in Massachusetts, it could also simply be a rock that had been shaped by the retreat of the glaciers - pitted and scarred from being ground and dragged against other rocks. I've seen a couple of glacial rocks in Connecticut that look like they could have been deliberately shaped into something weird, but then you start to find evidence that it's only Nature, playing tricks again. Get a better look at it and around it.